The 30-year-old California resident was last seen on surveillance footage at a gas station about 70 miles away, according to the Grand County Sheriff’s Office.

His actress sister posted a photo on her Instagram account Thursday, along with a poignant note.

“My heart is in a million pieces, Mikey. I could always count on you to make me laugh. You had such a good heart and will be forever missed. I’m at a loss for words but I know you are in a better place and finally at peace."